For Fortune 500 companies, green energy and greentech programs must not just be good for the environment, but solidly in the black. Here's how some businesses have managed to grow
their bottom lines while also reducing their carbon footprints.

Gas prices are creeping up to the $4 per gallon range, but hybrid vehicles remain beyond many drivers' budgets. These new cars, which tread lightly at both the gas pump
and the financing counter, are anything but econoboxes. More